A Letter Sent from Abu Mariam to Khalid Ibn Al Walid Regiment in Diyala Reference Number: MNFV-2007-000424 Categories: IraqIslamic State & Predecessor Groups Share via: Original English The handwritten note indicates that Abu Uthman and Harith are being transferred from intelligence to Khalid Ibn Al Walid regiment. It is addressed to Khalid Ibn Al Walid regiment from Abu Mariam, the security commander, and Abu Khutba.